环境扫描电镜用于阿利特-硫铝酸钡钙水泥早期水化的研究  

Investigation on The Early Stage Hydration of Alite-Calcium Barium Sulphoaluminate Cement Using ESEM

作　　者：左敏[1] 芦令超[1] 常钧[1] 叶正茂[1] 程新[1] 

机构地区：[1]济南大学材料科学与工程学院,山东济南250022

出　　处：《济南大学学报（自然科学版）》2007年第1期5-7,共3页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金(50672033);济南大学博士基金(B0517)

摘　　要：采用场发射环境扫描电子显微镜对阿利特-硫铝酸钡钙水泥的早期水化过程进行了连续观察,研究结果表明:阿利特-硫铝酸钡钙水泥的水化过程可分为诱导期前期、诱导期、加速期、减速期和稳定期5个阶段。水化初期,在水泥颗粒表面即可观察到大量的短柱状钙矾石,并形成保护膜,产生诱导期;在水化早期C-S-H凝胶数量较少,在加速期才大量形成,最终成为花朵状结构。该水泥在水化24 h后,其硬化浆体致密度较高,水化趋于稳定。Through continuous observation on the early stage hydration of alite- calcium barium sulphoaluminate cement with environmental scanning electron microscopy （ESEM）, it is shown that the early stage hydration of the cement can be divided into five stages,that is, the pro - induction, induction, accelerator）,, deceleration and stabilization periods. In the pre - induction period, a large amount of AFt can be observed on the Surface of the cement grains, and a protective membrane for/ned. In the early stage the amount of C - S- H gel is little,and polymorphic C- S- H started to precipilate in the acceleration period and formed a flower structure. After the cement being hydrated for 24 h,its microstructure become compact and the hydration become steady.

关 键 词：环境扫描电镜 阿利特-硫铝酸钡钙水泥 水化速率 早期水化 

分 类 号：TQ172[化学工程—水泥工业]